Nextcloud 13 installation guide (Debian 9.4 stretch)

Following this guide you will be able to install and configure Nextcloud 13 latest based on Debian 9.4 stretch, NGINX 1.14, openssl 1.1.0h, TLSv1.3, PHP 7.2, MariaDB, Redis, fail2ban, firewall (ufw) and will achieve an A+ rating from as well Nextcloud as Qualys SSL Labs. We will request and implement the ssl certificate from Let’s Encrypt in chapter X.

You only have to ammend the red marked values (YOUR.DEDYN.IO, 192.168.2.x, 22) regarding your environment!

Are we dealing with some live update here? If so, I will refrain from spamming you any further than this:
The section where you update openssl is missing, but the chapter header is there. The easiest way for me was: